Change the "From:" address in Unix "mail" Changing the From Address in Unix mail When working with email in a Unix environment one common requirement is to modify the From address in outgoing emails sen 3 min read 09-10-2024 41
Command-line Unix ASCII-based charting / plotting tool Command line Unix ASCII Based Charting and Plotting Tool Understanding the Problem When it comes to data visualization many users rely on graphical user interfa 3 min read 09-10-2024 49
execv() and const-ness Understanding execv and Const ness in C In the world of C programming system calls play a crucial role in process management One such system call is execv which 2 min read 09-10-2024 54
How to get the current directory in a C program? How to Get the Current Directory in a C Program In C programming managing file paths and directories is an essential skill particularly when your application ne 3 min read 09-10-2024 68
Get list of static libraries used in an executable How to Retrieve the List of Static Libraries Used in an Executable When developing software especially in languages like C or C its common to link your program 2 min read 09-10-2024 72
Replace \n with \r\n in Unix file How to Replace n with r n in Unix Files In the world of text file manipulation dealing with newline characters can be a common yet challenging task especially f 3 min read 09-10-2024 47
How do I create an array in Unix shell scripting? How to Create an Array in Unix Shell Scripting Unix shell scripting is a powerful way to automate tasks and manage system operations One fundamental concept in 2 min read 09-10-2024 49
How does getaddrinfo() do DNS lookup? Understanding How getaddrinfo Performs DNS Lookup Introduction to the Problem When developing network applications one common requirement is to convert human re 3 min read 08-10-2024 70
Generate sha256 with OpenSSL and C++ How to Generate SHA 256 Hash with Open SSL and C In today s digital age data integrity and security are of utmost importance One of the widely used methods to e 3 min read 08-10-2024 45
shell script: search and replace over multiple lines Efficient Multi line Search and Replace in Shell Scripts When working with shell scripts one common task is the need to search and replace text across multiple 3 min read 08-10-2024 56
check duration of audio files on the command-line How to Check the Duration of Audio Files Using Command Line Tools In our fast paced digital world managing audio files efficiently is essential for creators edi 3 min read 08-10-2024 53
How to check if a file is empty in Bash? How to Check if a File is Empty in Bash When working with files in Bash it is often necessary to determine whether a file is empty or contains data This simple 2 min read 08-10-2024 53
How to display only different rows using diff (bash) How to Display Only Different Rows Using diff in Bash When working with files in the command line you may encounter situations where you need to compare two fil 2 min read 08-10-2024 45
How to delete all files in a folder, but not delete the folder using NIX standard libraries? How to Delete All Files in a Folder Using NIX Standard Libraries Without Deleting the Folder Deleting files from a directory is a common task in programming and 3 min read 08-10-2024 45
How can I set the last modified time of a file from python? How to Set the Last Modified Time of a File in Python When working with files in Python you may come across a situation where you need to update the last modifi 3 min read 08-10-2024 38
Store st_mode (from stat) in a file and reuse it in chmod Storing and Reusing st mode from stat for chmod In the world of Unix like operating systems managing file permissions efficiently is crucial for system security 3 min read 08-10-2024 54
Display two files side by side How to Display Two Files Side by Side in Your Development Environment In programming and data analysis it s common to need a side by side view of two files This 2 min read 08-10-2024 48
if statement to check $HOSTNAME in shell script Understanding the Use of If Statements to Check HOSTNAME in Shell Scripts When working with shell scripts one common requirement is to perform actions based on 3 min read 07-10-2024 44
Forking vs Threading Understanding Forking vs Threading A Comprehensive Guide In the realm of programming and operating systems developers often face the critical decision of how to 3 min read 07-10-2024 44
how to diff and show only exact differences for 2 long string How to Diff and Show Only Exact Differences for Two Long Strings When working with large strings in programming especially when comparing two long pieces of tex 2 min read 07-10-2024 38
Kill a process and wait for the process to exit How to Kill a Process and Wait for It to Exit A Comprehensive Guide In the world of computing managing processes efficiently is crucial for maintaining optimal 3 min read 07-10-2024 62
How can I check the first character in a string in Bash or Unix shell? How to Check the First Character of a String in Bash or Unix Shell When working with strings in Bash or Unix shell scripting its often necessary to inspect the 2 min read 07-10-2024 54
Is there a way to look for a flag in a man page? Finding Your Flag Navigating Man Pages with Ease Ever felt lost in the vast sea of options a command offers Trying to find that specific flag you need in a dens 2 min read 07-10-2024 37
Meaning that is displayed by [alternatives --config mta] is what? Understanding the Output of alternatives config mta Problem You re trying to understand the output of the command alternatives config mta and what it means Simp 2 min read 07-10-2024 44
cp: missing destination file operand after cp missing destination file operand after A Common Linux Command Error and How to Fix It Have you ever encountered the dreaded cp missing destination file opera less than a minute read 07-10-2024 42